A solenoid valve

Abstract

This utility model discloses an electromagnetic valve, including a housing and a stationary yoke. A limiting hole is provided at the center of the top of the housing, and a coil is located inside the housing. A moving armature is slidably fitted within the limiting hole, and a push rod valve core is fixed to the bottom of the moving armature. A through hole is provided at the center of the yoke, through which the push rod valve core is slidably fitted to the stationary yoke. A valve sleeve is fitted below the stationary yoke, with a pressure input port at the bottom end and a flow channel within the sleeve. A pressure output port is located in the middle of the valve sleeve, and both the pressure input and output ports are connected to the flow channel. A spring seat is located at the bottom of the flow channel, containing a spring. A steel ball is located at the top of the spring and is fixed to the bottom end of the push rod valve core. The steel ball is used to open and close the pressure output port. This electromagnetic valve, by adding a push rod valve core to the moving armature, allows the moving armature to open and close the flow channel with a relatively short stroke. This design provides good stability for the moving armature and prevents it from getting stuck in the coil.

Description

Technical Field

[0001] This utility model relates to electromagnetic valve technology, specifically an electromagnetic valve. Background Technology

[0002] A solenoid valve is an electromagnetically controlled industrial device, a fundamental component of automation systems used to control fluids. It belongs to the actuator category and is not limited to hydraulic or pneumatic systems. It is used in industrial control systems to adjust the direction, flow rate, speed, and other parameters of the medium. Solenoid valves can be used with different circuits to achieve the desired control, ensuring both precision and flexibility. There are many types of solenoid valves, each playing a different role in the control system. The most common types are check valves, safety valves, directional control valves, and speed control valves.

[0003] Currently, the operation of solenoid valves is generally achieved by electromagnetic force driving the moving armature to move back and forth along the coil assembly, thereby directly opening and closing the flow channel. The stroke of the moving armature and the length of the coil are relatively long, resulting in poor stability of the moving armature, easy jamming of the moving armature in the coil, and large coil size. Utility Model Content

[0004] To address the shortcomings of the prior art, this utility model provides a solenoid valve in which a push rod valve core is added to the moving armature. The moving armature only needs to move a short distance to open and close the flow channel through the push rod valve core. The moving armature has good stability and prevents it from getting stuck in the coil.

[0005] To achieve the above technical objectives, this utility model adopts the following technical solution: A solenoid valve includes a housing and a stationary yoke. A limiting hole is provided at the center of the top of the housing. A coil is provided inside the housing and wound around the outer periphery of the limiting hole. A moving armature is slidably fitted inside the limiting hole. A push rod valve core is fixed at the bottom of the moving armature. The stationary yoke is located at the bottom of the housing and has a through hole at its center. The push rod valve core is slidably fitted to the stationary yoke through the through hole. A valve sleeve is fitted below the stationary yoke. A pressure input port is provided at the bottom of the valve sleeve. The valve sleeve has a flow channel, which is vertically arranged. A pressure output port is provided in the middle of the valve sleeve. Both the pressure input port and the pressure output port are connected to the flow channel. A spring seat is provided at the bottom of the flow channel. A spring is provided inside the spring seat. A steel ball is provided at the top of the spring. The steel ball is fixed to the bottom of the push rod valve core and is used to open and close the pressure output port.

[0006] Preferably, a plurality of stop plates are evenly distributed at the bottom of the housing, and the stop plates are bent inward to fix the stationary yoke and valve sleeve to the housing.

[0007] Preferably, the bottom of the moving armature is provided with a groove, and the groove is conical.

[0008] Preferably, the valve sleeve is provided with a flange.

[0009] Preferably, the valve sleeve is provided with a throttling orifice, which is located between the pressure input port and the pressure output port, and the throttling orifice is connected to the flow channel.

[0010] Preferably, the valve sleeve is provided with a pressure relief port, the pressure relief port is located at the top of the valve sleeve and is connected to the flow channel, and the push rod valve core is provided with a push plate in the middle, the push plate being used to open and close the pressure relief port.

[0011] Preferably, mounting seats are provided on both sides of the outer casing, and the mounting seats are provided with mounting bolts.

[0012] Preferably, the pressure output port is equipped with a side filter.

[0013] Preferably, the pressure input port is equipped with a filter screen.

[0014] Preferably, the moving armature has a protrusion in the middle, which is used to limit the moving armature within the housing.

[0015] In summary, this utility model achieves the following technical effects:

[0016] The solenoid valve of this invention uses a push rod valve core added to the moving armature. The moving armature only needs to move a short stroke to open and close the flow channel through the push rod valve core. The moving armature has good stability and prevents the moving armature from getting stuck in the coil. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the solenoid valve of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the solenoid valve of this utility model;

[0019] Explanation of reference numerals in the accompanying drawings: 1. Moving armature; 2. Push rod valve core; 3. Steel ball; 4. Spring seat; 5. Spring; 6. Valve sleeve; 7. Flange; 8. Stationary yoke; 9. Coil; 10. Housing; 11. Sealing ring; 12. Pressure input port; 13. Filter screen; 14. Throttling orifice; 15. Pressure output port; 16. Side filter screen; 17. Pressure relief port; 18. Mounting base; 19. Mounting bolt. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings.

[0021] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0022] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0026] Example 1:

[0027] like Figure 1As shown in Figure 2, a solenoid valve includes a housing 10 and a stationary yoke 8. A limiting hole is provided at the center of the top of the housing 10. A coil 9 is provided inside the housing 10 and wound around the outer periphery of the limiting hole. A movable armature 1 is slidably fitted inside the limiting hole. A push rod valve core 2 is fixed to the bottom of the movable armature 1. The stationary yoke 8 is located at the bottom of the housing 10 and has a through hole at its center. The push rod valve core 2 is slidably fitted to the stationary yoke 8 through the through hole. A valve sleeve 6 is fitted below the stationary yoke 8. A pressure input port 12 is provided at the bottom of the valve sleeve 6. The valve sleeve 6 has a flow channel, which is vertically arranged. A pressure output port 15 is provided in the middle of the valve sleeve 6. Both the pressure input port 12 and the pressure output port 15 are connected to the flow channel. A spring seat 4 is provided at the bottom of the flow channel. A spring 5 is provided inside the spring seat 4. A steel ball 3 is provided at the top of the spring 5. The steel ball 3 is fixed to the bottom of the push rod valve core 2 and is used to open and close the pressure output port 15.

[0028] In the power-off state, spring 5 pushes steel ball 3 through steel ball 3 and sealing cone surface to isolate pressure input port 12 and pressure output port 15. When the pressure at pressure input port 12 is too high, it is relieved through throttle hole 14 on valve sleeve 6; at the same time, pressure output port 15 is connected to pressure relief port 17 to relieve pressure.

[0029] When energized, the moving armature 1 pushes the push rod valve core 2 to move, pushing the steel ball 3 away from the sealing cone surface. The pressure input port 12 is connected to the pressure output port 15 through the flow channel, and pressure is input to the pressure output port 15. At the same time, under the push of the moving armature 1, the push plate of the push rod valve core 2 seals with the cone surface of the valve sleeve 6, separating the pressure output port 15 from the pressure relief port 17.

[0030] In this embodiment, the solenoid valve uses a push rod valve core 2 added to the moving armature 1. The moving armature 1 only needs to move a short stroke to open and close the flow channel through the push rod valve core 2. The moving armature 1 has good stability and prevents the moving armature 1 from getting stuck in the coil 9.

[0031] The bottom of the outer shell 10 has several stop plates evenly distributed. The stop plates are bent inward to fix the static yoke 8 and the valve sleeve 6 to the outer shell 10.

[0032] The moving armature 1 has a groove at its bottom, and the groove is conical. The conical groove increases the electromagnetic force on the moving armature 1, making the movement of the moving armature 1 smoother and further preventing the moving armature 1 from getting stuck.

[0033] The valve sleeve 6 is provided with a flange 7.

[0034] The valve sleeve 6 is provided with a throttling orifice 14, which is located between the pressure input port 12 and the pressure output port 15 and is connected to the flow channel. The throttling orifice 14 can be used to release excessive pressure when the pressure at the pressure input port 12 is too high.

[0035] The valve sleeve 6 is provided with a pressure relief port 17, which is located at the top of the valve sleeve 6 and is connected to the flow channel. The push rod valve core 2 is provided with a push plate in the middle, which is used to open and close the pressure relief port 17.

[0036] The outer casing 10 is provided with mounting bases 18 on both sides, and the mounting bases 18 are provided with mounting bolts 19.

[0037] The pressure output port 15 is equipped with a side filter 16.

[0038] The pressure input port 12 is equipped with a filter screen 13.

[0039] The moving armature 1 has a protrusion in the middle, which is used to limit the moving armature 1 within the outer casing 10.

[0040] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall fall within the scope of the technical solution of the present utility model.

Claims

1. An electromagnetic valve characterized by comprising: The device includes a housing and a stationary yoke. A limiting hole is located at the center of the top of the housing. A coil is located inside the housing and wound around the outer periphery of the limiting hole. A moving armature is slidably fitted within the limiting hole. A push rod valve core is fixed to the bottom of the moving armature. The stationary yoke is located at the bottom of the housing and has a through hole at its center. The push rod valve core is slidably fitted to the stationary yoke through the through hole. A valve sleeve is fitted below the stationary yoke. A pressure input port is located at the bottom of the valve sleeve. The valve sleeve has a flow channel, which is vertically oriented. A pressure output port is located in the middle of the valve sleeve. Both the pressure input port and the pressure output port are connected to the flow channel. A spring seat is located at the bottom of the flow channel, containing a spring. A steel ball is located at the top of the spring and fixed to the bottom of the push rod valve core. The steel ball is used to open and close the pressure output port.

2. The solenoid valve according to claim 1, wherein The bottom of the outer casing has several stop plates evenly distributed, and the stop plates are bent inward to fix the stationary yoke and valve sleeve to the outer casing.

3. The solenoid valve according to claim 1, wherein The moving armature has a groove at its bottom, and the groove is conical.

4. The solenoid valve according to claim 1, wherein The valve sleeve is equipped with a flange.

5. The solenoid valve according to claim 1, wherein The valve sleeve is provided with a throttling orifice, which is located between the pressure input port and the pressure output port, and the throttling orifice is connected to the flow channel.

6. The solenoid valve according to claim 1, wherein The valve sleeve is provided with a pressure relief port, which is located at the top of the valve sleeve and is connected to the flow channel. The push rod valve core is provided with a push plate in the middle, which is used to open and close the pressure relief port.

7. The solenoid valve according to claim 1, wherein Mounting seats are provided on both sides of the outer casing, and mounting seats are provided with mounting bolts.

8. The solenoid valve according to claim 1, wherein The pressure output port is equipped with a side filter.

9. The solenoid valve according to claim 1, wherein The pressure input port is equipped with a filter screen.

10. The solenoid valve according to claim 1, wherein The moving armature has a protrusion in the middle, which is used to limit the moving armature within the housing.

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